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1 SURE SHOT QUESTIONS Long Questions:- Subject:- Informatics Practices Class- XII 1. Deb Bastralaya has developed a GUI application for their company as shown below The company accepts payments in 3 modes- cheque, cash and credit cards.the discount given as per mode of payment is as follows. Mode of Payment Discount Cash 12% Cheque 9% Credit Card Nil If the Bill Amount is more than then the customer gets an additional discount of 10% on Bill Amount. (i) Write the code to make the textfields for Discount (named txtdisc) and Net Amount (named txtnetamt) uneditable. (ii) Write code to do the following: (a) When "Calculate Discount" button is clicked the discount should be calculated as per the given criteria and it should be displayed in the discount textfield. Calculate Net Amount button (named btncalcnetamt) should also be enabled.

(b) When "Calculate Net Amount" button is clicked the net amount should be calculated and it should be displayed in the net amount textfield. 2. Mr, Ram a UDC in a KV, created a table salary.

He wrote the following query: SELECT * FROM Salary WHERE HRA = NULL ; Help Ram to run this query by removing the error from the query and rewriting it. 3.

2 (b) When "Calculate Net Amount" button is clicked the net amount should be calculated and it should be displayed in the net amount textfield. 2. Mr, Ram a UDC in a KV, created a table salary. HRA is a column of this table. To find the details of the staff members who did not get HRA. He wrote the following query: SELECT * FROM Salary WHERE HRA = NULL ; Help Ram to run this query by removing the error from the query and rewriting it. 3. In a database there are two tables " STOCK" and " DEALERS" as shown below: (i) Identify the foreign key in the table STOCK. (ii) To display item from the stock table and Dname from the dealers table for the corresponding matching dealer code. 4. Mr. Virat created a table Student in MySQL. He forget to set the PRIMARY KEY for the table. Which command should he used to set it for the field Rollno.

3 5. Write a method in Java that takes a number as parameter and return sum of its divisors. 6. What are the use of the following tags- <UL>, <HEAD>, <SUP>, <P> 7. What is primary key? How is it different from candidate key? Explain with the help of suitable example. 8. Rewrite the following code using for loop. int i=0; while(++i<10) if( i==5) break; System.out.println(i++); 9. The following code has some error(s). Rewrite the correct code underlining all the corrections made. int x=3; switch(x); case 1: System.out.print( Yes its One ); case >2: System.out.println( Yes its more than Two ); break; case else: System.out.print( Invalid Number): 10. What will be the content of jtextfield1 and jtextfield2 after executing the following code: String st= India is the great ; jtextfield1.settext(st.replace( India, Bharat ); jtextfield2.settext(st.substring(7)); 11. If a database School Exists, which MySql command help you to start working in that database. 12. Write output of the following SQL queries : i) SELECT TRUNCATE(23.72,-1); ii) SELECT DAYOFMONTH( );

4 iii) SELECT SUBSTRING( India ki awaz,8,6); iv) SELECT CONCAT(LOWER( Class ),UPPER( xii )); 13. Create table Employees as per following table instance chart. Column Name EmpID EmpName EmpAddress EmpPhone EmpSal DeptID Key Type Primary Foreign Nulls/Unique NOT NULL Fk Table Fk column Department Dept_ID Datatype NUMBER VARCHAR VARCHAR VARCHAR NUMBER VARCHAR Length , In a database there are two tables LOAN and BORROWER as shown below : LOAN Loan_Number Branch_name Amount L-170 Downtown 4000 L-230 Redwood 2500 L-260 Perryridge 1700 BORROWER Customer_ID Customer_Name Loan_number 100 Jones L Smith L Hayes L-260 (i) Which column in the BORROWER table is the foreign key? (ii) How many rows and how many columns will be there in the Cartesian product of these two tables? 15. Abhishek works for a Sports company. He wants to create controls on a form for the following functions. Choose appropriate controls from Text Field, Label, Radio Button, Check box, List, Combo Box, Button and write in the third column. S.No. Controls used to Control 1 Enter Team name

5 2 Select Sports type 3 Enter number of members 4 To save the details 16. The following code has some error(s). Rewrite the correct code underlining all the correction made : Integer a ; b = 20 ; Do a= B*2 ; b= b+10 WHILE(b>40) 17. What will be displayed in resultta after executing the following statement? resultta.settext( India\nis\the\nbest ); 18. How is primary key constraints different from Unique constraint. Explain with example. 19. Find the output of the following code : int num= 736, reb ; while(num!=0) reb= num%10; System.out.print(reb); num= num/10; 20. While working in netbeans, Gangaram included two option buttons ( Male and Female ) in the form. Now he wants that all the buttons should work in groups, i.e. Selecting one button other buttons will be deselected. Which property of listbox control should he use to do this? 21. Write html code for the following : To provide the hyperlink Input a name from a text field and print it by adding Welcome before a name in a label. 23. Given a string object namely phy having value as 65 stored in it. What will be result of following code? JOptionPane.showMessageDialog(null, + (phy.length( )+ Integer.parseInt(phy))); 24. Find the output of the following program :-

6 String s1= IN$D$I$$A$$$ ; // $Represents a space String s2; s2= s1.trim( ); int lenn= s2.length( ); lenn++; Sysemtem.out.println(lenn); 25.Write a java function to return the cube of a number. 26. Write Java code that takes principal amount, rate and time using JOptionPane and print simple interest. 27. How many times the following loop runs Int i,s=0; for(i=0;i<=10;i-=2) s=s+i; i=i+4; 28. Differentiate HAVING and WHERE clause with suitable example. 29. What will be the contents of the text1 and text2 after the following code is executed. String text1,text2; text1 = KendriyaVidyalaya ; text2.settext(text1.length()+ ); text1=text1.concat( Sangathan ); 30. What will the content of TextField after executing the following statements. String S= vidyalaya ; jtextfield1.settext(s.substring(0,1).touppercase()+s.substring(1)); 31. What will be the output of the following code: int A = 15, B ; for (B=2; B<=6; B+=2) A= A + B; JOptionPane. showmessagedialog (null, A: +A+ B: +B+ ) ; 32. Miss Nisha created a table JOURNEY with 3 rows and 5 columns. She added one more row to it and deleted 1 column. What is it cardinality and Degree of the table JOURNEY?

7 33. Consider the table STUDENT and SQL statements 34. Admno RollNo Class Student name Fathers Name XII Ram Raj XI Ravi Rao XI Rakesh Ramana XII Rajini Raghav Identify Candidate keys and Primary Keys for the above table 34.Convert the following code into an equivalent do..while loop. int i,j,c=2; for( i=10,j=20; j>=10; j =j+2) i = i +C; System.out.println(i); 35. What do you mean by E-governance? Write any two Web addresses of e-governance. 36. Consider the following table Employ, Write SQL Commands for i to iv and output for v and vi 6 No. Name Age Department Date ofjoin Salary Sex 1 Jugal 33 Computer 10/01/ M 2 Sharmila 31 History 23/03/ F 3 Sandeep 32 Maths 12/12/ M 4 Sangeeta 35 History 01/07/ F 5 Rakesh 42 Maths 05/09/ M 6 Shyam 50 History 27/06/ M 7 Shiv Om 44 Computer 25/02/ M 8 Shalaka 33 Maths 31/07/ F i) Display details of all female history teachers ii) Count the number of teachers whose name have h as second letter iii) Display Name, age, Salary in the descending order of age and ascending order of salary iv) Increase the salary of all Computer teachers above 40 years by Rs Compare PAN, LAN, MAN, WAN in terms of Speed and Error rate. 38. Mr. Amit developed the following GUI application for Calculating Salary.

8 Help him to write coding for the following i) Calculate Salary as per the following criteria BASIC PAY=BASIC+GRADE PAY DA= 90% OF BASIC PAY Display the DA in its appropriate textfield. ii) HRA should calculated according to the type of city (Chosen from the listbox) Type of City TYPE-A TYPE-B TYPE-C Percentage 30% OF BASIC PAY 20% OF BASIC PAY 10% OF BASIC PAY GROSS=BASICPAY+DA+HRA Professional tax should be assigned as Rs. 300/- for Teaching Staff and Rs. 0/- for Non-teaching tax NET SALARY= GROSS-PROFESSIONAL TAX Display all calculated values in appropriate text fileds. iii) Clear button should clear all textfields. 39. Expand the following terms? (a)smtp (b)nic (C) FLOSS (D)VIRUS 40. What will be values of x and y after execution of the following code int x, y = 0; for( x= 1; x<=5; ++x) y=x++; --y; 41. What is difference between these queries? Query 1 Query 2 Select count(*) Select count(shop_id) from shop From shop 42. Name of keyword used in MYSQL? (i) To search null entry (ii) to allow duplicate value in query 43. The Movie_Name Column of a table MOVIE is given below: Movie_Name Kal Ho na ho Singh is King

9 Bodyguard Singham Kal aaj aur Kal Based on the information find the putput of the following queries: i.select Movie_Name from MOVIE where Movie_Name Like _al%al ; ii. Select Movie_Name from MOVIE where Movie_Name Like %ng% ; 44. How many times will the following while loop executed? int l=50,m=0; while(l<70) m=m+l; l=l+2; 45. Write the following code using if-else if without change in output switch (day) case 1: case 2: case 3: case 4: case 5:System.out.println( working day ); break; default: case 6: case 7: System.out.println( holiday ); break; System.out.println( not a week day ); 46. What is the value of A & B after the execution of the following code:- int A=200,B=6; while(b<=12) A+=B; B=B+2; JOptionPane.showMessageDialog(this, A: +A+ B: +B+ ); 47. write a SQL command to create a table Electronic with following structure Attribute Type Constraint Item_id Int Not null,primary key Item_name Varchar(25) Not null Type Varchar(10) Manufacture Varchar(10) Price Int Number_of_item Int

10 48. Mr.Khan working as Manager in Unique Enterprises want to create a form in NetBeans to take various input from user & shown some message.choose appropriate controls from Combo box,label, TextField, ListBox, TextBox, RadioButton, CheckBox, TextArea and CommandButton S.no. Function 1 Display message 2 Select Hobby of customer 3 Select City from list 4 Get all details from customers 49.Consider the table CRICKET given below.write the commands in SQL for (i) to (iv) S PLAYER l. N O 1 Sachin Tendulkar 2 Virender Sehwag A GE CITY RUN S WICKET S 39 Mumbai Delhi M.S.Dhoni 32 Rachi Rahul Dravid 37 Banglor e 5 Yuvraj Singh 32 Mumbai (i)to display all the information about the players who lived in Mumbai city. (ii)to display Players name, age and runs who have scored more then 8000 runs. (iii)to display Player name and city of those players who have not taken any wickets. 50. Write a java function to return greatest number amongst three numbers.

KENDRIYA VIDYALAYA SANGATHAN CLASS XII EXAMINATION INFORMATICS PRACTICES (065)

KENDRIYA VIDYALAYA SANGATHAN CLASS XII EXAMINATION INFORMATICS PRACTICES (065) Time Allowed: 3 Hours Maximum Marks: 70 Instructions: (i) All questions are compulsory. (ii) Programming Language: Java, SQL